The REF610 feeder protection relay safeguards distribution feeders in ABB power and industrial networks. This unit monitors current and voltage continuously and trips breakers on fault conditions. Engineers specify it for reliable overcurrent and earth-fault protection in medium-voltage switchgear.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Type | Feeder Protection Relay |
| Compatibility | ABB Distribution and Industrial Power Systems |
| Protection Functions | Overcurrent, Earth Fault, Thermal Overload |
| Current Inputs | 3 Phase Currents, 1 Earth Current |
| Rated Current | 1 A or 5 A, Selectable |
| Interface | Terminal Blocks, Serial Communication Port |
| Dimensions | 160 mm x 130 mm x 180 mm |
| Weight | Approximately 1.60 kg |
| Component Count | 112 Active Electronic Components |
| Energy Storage | 3.0 V Lithium Backup Battery |
| Power Consumption | 24–240 VDC / 110–240 VAC, 8 VA |
| Operating Temperature | -25°C to 55°C |
| Relative Humidity | 5% to 95%, Non-Condensing |
Protection and Measurement Logic
The relay measures three phase currents plus one earth current channel. Therefore, it detects overloads, short circuits, and ground faults quickly. Furthermore, thermal models protect motors and cables from sustained overload damage. Consequently, operators avoid costly equipment failures.
Interface and Communication
Terminal blocks link the REF610 to current transformers and trip circuits. As a result, installers complete field wiring without special adapters. Additionally, a serial port supports remote monitoring and parameter setting.
Power and Environmental Ratings
The unit accepts 24–240 VDC or 110–240 VAC auxiliary supply options. Moreover, it operates from -25°C to 55°C in switchgear enclosures. Consequently, it suits both indoor panels and protected outdoor installations.
Installation Notes
Operators mount the relay into a standard panel cutout with rear terminals. The sealed front face resists dust and moisture in industrial rooms. However, users should verify current transformer ratios before setting protection thresholds.
Details
| Weight | 0.6 kg |
|---|---|
| Dimensions | 180 × 110 × 20 mm |
